H1:ISC-RF_C_SQZAOM200M_OUTPUTMON correlates with range drops even on sub-second time scales.

Attached are plots for GPS

1256913467 (same drop as in alog 52979)
1257226318 (today)
1257229296 (today)

Note that the sharp drop in 1256913467 corresponds down to the second with the range drop in alog 52979.

FRS 5088

H1:IMC-MC2_TRANS_NSUM_OUT channel is calibrated in Watts for the internal power buildup. In the attached plot, I don't see excessive acoustic peaks like the ones observed at LLO before increasing the beam size on IMC WFS (LLO alog 12426) and therefore don't see the need for the change at LHO.

BRSY seems to be close to it's range.

Ed, Camilla

16:47UTC The large equpiment bearing truck that is currently parked on the road beyond the gate will unload a backhoe/frontloader and slowly drive it to the water tower area. I'll note more accurate times as this takes place for DetChar.

Ed and Camilla

TITLE: 11/08 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 108Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 1mph Gusts, 0mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.38 μm/s
QUICK SUMMARY:

Expecting some noise later in the day when a  truck moves equipment down the arms for the wind fence.

TITLE: 11/08 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 111Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY:

A couple of earthquakes caused some action in the middle of this freezing fog shift.  Have a couple of Hand-Off Notes for other shifts:

1) Restarting Cal Lines:  Whenever H1 loses lock, please email Aaron V. and Maddie Wade so they can restart them.

2) Squeezer Tests:  Not sure there's still a call for it, but it was mentioned to try some tests to address H1 range when it drops to 110Mpc or below (see Sheila's alog here).
LOG:

• 9:48 Incoming EQ (Samoa) alerts
  • 9:54 begin seeing jump in BLRMS
  • 10:03 begin seeing on tidal, ASC, & CPS signals...and then they drop
  • 10:17 tidal, ASC, & CPS jump again a bit bigger, and also see on LSC signals.
  • 10:17-10:19 transition to EARTHQUAKE
  • 10:49-10:50 transition back to WINDY
• 10:30 PSL Chiller topped off (Corey)
• 10:52 Incoming EQ (Tonga) alerts
  • 11:06 CPS jumps up to large value, well before the R-wave arrival time.
  • 11:07 EARTHQUAKE Lockloss (I should have been quicker to jump on transitioning to EARTHQUAKE)
• LOCK#1 11:06 - 11:39 (SEI CONF left in WINDY)
  • Green arms:  Y-arm not locking. 
    • After 5-min Ops Wait:  ETMy Pit moved -1.1 clicks immediately locks up.
  • FIND IR:  Moving Diff Offset VERY slowly (and sticking around ~+30.0) & not finding anything for Y-arm. 
    • 11:25-11:27 I begin moving Diff Offset to complete CHECK IR.
  • DRMI Locking:  Guardian used PRMI state to touch up alignment
    • Lockloss at TURN ON BS STAGE2
  LOCK#2 11:40-12:21
  • DRMI Locking:
    • 11:48 OM2 WD trip!  (& cleared)
    • 11:50 OM1 WD trip!  (& cleared)
    • Seeing large inputs to these optics from ISC (& also they are railed with big values as seen on SatMon.adl & on each OM1 & OM2 medm).  Cleared History to clear saturations, but this did not work.  Once Verbal started complaining about "OMC", a few minutes later, Clearing History finally worked for both OM1 & OM2.  Not sure of the distinction of why it all of a sudden worked.
  • 12:21 Back To Observing!
• There is a turck on-site to deliver some large equipment for the Wind Fence.  They are parked at the gate, but Jeff J will be escorting them (possibly to an end station).  Since this high priority work, we will allow this during Observing & be sure to note the times if they go down the arms and unload.

Lost lock to an earthquake (sent an email to Aaron V. to restart Cal Lines at Keita's request).

Currently locking H1 & at Increase Power step currently (after about 63min ffrom lockloss).  

Crossing Fingers.

Topped off Crystal Chiller with 260 mL.  Diode Chiller OK.  
Filters look fine (slight yellow tint of Crystal filter [known item]).

TITLE: 11/08 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 111Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    SEI_CONF state: WINDY
    Wind: 2mph Gusts, 1mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.25 μm/s

useism has been trending up the last 24hrs.  (one note about that is Jim mentioned we might want to take the new SEI_DIFF guardian node from nominal FULL_DIFF_CPS to DOWN to get data when we have high useism, BUT not yet...he will need to fix SDF for this and get go ahead from Keita).
QUICK SUMMARY:

H1's been in observing 10.5hrs.  Have seen H1's range take a few visible steps down in last 3-4hrs (Jim mentioned alogs about Squeezer by Sheila about this).  Other than that, all is well thus far.

TITLE: 11/08 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 110Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Quiet shift
LOG:
Ed had an earthquake when I came in. Not much else has happened.

I remeasured the CARM pole as we did in April.

CARM pole = 0.595 +- 0.007 Hz.

The method was pretty much the same as before, I just looked at the Input RIN using H1:PSL-ISS_SECONDLOOP_RIN_OUTER_OUT_DQ rather than H1:IMC-IM4_TRANS_NSUM_OUT_DQ (but these have a TF of unity, so they witness the same thing).
My B channel this time was H1:LSC-POP_A_RIN_OUT_DQ, this corresponded well with using the arm transmission as B channels as well.
The coherence is marginal, I fit only to points between 13 and 29 Hz.  Could bias this estimate.

S. Dwyer, S. Karki

We noticed yesterday that the ADS lines running at ETMY were showing up in ETMX and eventually into the DARM (attached plot- The dither lines are at : ETMX: P= 20.131, Y= 22.347 amd ETMY: P:20.789, Y=21.9 ). We thought we could reduce this coupling by notching these ADS lines in DHARD. We tested this today by  applying the notch at both the DHARD pitch and yaw. After notching the lines and opening the ADS servo loops we tried to see if we can reduce these lines in the DARM by changing the A2L gain. We tried both pitch and yaw at ETMY and didnot see any significant difference.

I multiplied the FM10 "cal" filter in H1:LSC-REFL_A_RIN and H1:LSC-REFL_B_RIN by 2.616, bringing the gain from 0.1168 to 0.3055, at Nov 08 2019, 00:44:23 UTC.

I did this because during my last intensity injection, the REFL A/Input RIN and REFL B/Input RIN TFs were not unity, equaling ~ 0.382.
After a quick chat with Daniel, the RIN chan was calibrated using the IFO at 2W, before thermal changes and RF driver sliders were changed.
I recalibrated it such that REFL {A,B}/Input RIN = 1 at full IFO with 38.1 W requested, 33.5 W incident on the PRM. 

The flow rate seems to be consistent following the chiller was swap back in September (alog52208). We have not had any lost observing time due to a relocking laser, but we have had a handful of laser relocks. Two of them happened during the SRC part of initial alignment, though perhaps this just very coincident. Overall, I would say things look healthy.

Following up on work by Beverly, I ran a short Lasso run on today's range drop. The run spans 2019-11-06 02:00-07:00. Clearly very highly correlated channels are as follows:

Channel "Pearson Coefficient"
0.9799929848627831 H1:SQZ-DCPD_SUM_RMS1_MON.mean
0.9725502574463882 H1:SQZ-DCPD_RATIO_1_MON.rms
0.9312747855964804 H1:SQZ-DCPD_SUM_RMS1_MON.rms

The full page output is at https://ldas-jobs.ligo-wa.caltech.edu/~jrsmith/detchar/O3b/lasso-Nov-6-2019-2/ (updated using the fancy new python 3 version)

Figures below show:
1) The range drop from the summary pages.
2) The range and scaled SQZ DCPD channel
3) A scatter plot of range vs SQZ values
4) The other channels that are duplicate of the SQZ winner

I think not much new from what Beverly reported so far. Happy to follow up with further inquiries. 

Nutsinee, Daniel, Sheila

We have some requests for the operators to try some tests next time the range drops to around 110Mpc.  We'd ask you to try each of these tests, which you can do by copying and pasting the lines below into a terminal.  Waiting 10-15 minutes between each one would make sure we what happens.  If any of these appear to fix the problem (or the range goes back to normal on its own) obviously you can stop the test. 

Keita has OK'd staying in observe, so before starting this go into SDF and unmonitor these channels, and remonitor them when you are done.   If there is a problem with this and we are out of observing momentarily that's sort of OK, although we would like to avoid it if possible.  Also, please alog carefully and include times when you do this. Thank you.

1) increase SHG gain by 20dB

• caput H1:SQZ-SHG_SERVO_IN1GAIN 27
• Wait 5-10 minutes. 
• caput H1:SQZ-SHG_SERVO_IN1GAIN 7

2)H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG move up  and down by 10 degrees, wait 10-15 minutes between moves.  

• caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 120
• wait 5-10 minutes
• caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 100
• wait 5-10 minutes
• caput H1:SQZ-CLF_REFL_RF6_PHASE_PHASEDEG 110

3)lower CLF ISS gain

• caput H1:SQZ-CLF_ISS_GAIN 10
• wait 5-10 minutes
• caput H1:SQZ-CLF_ISS_GAIN 16